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11 !"# q C q dq Vbattery R 0 C dt q(t ) q (1 e t /RC ) 0 R 0 I (t ) I0e t / RC q CVbattery A circuit is wired up as shown below. The capacitor is initially uncharged and switches S1 and S2 are initially open. ' / ' .
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0 0 7 A circuit is wired up as shown below. The capacitor is initially uncharged and switches S1 and S2 are initially open. '
+  After being closed a long time, switch 1 is opened and switch 2 is closed. What is the current through the right resistor immediately after switch 2 is closed? A B. IR = V/3R C. IR = V/2R D. IR = V/R A. B IR = 0 C D 22 9 A circuit is wired up as shown below. The capacitor is initially uncharged and switches S1 and S2 are initially open. '
+  After being closed a long time, switch 1 is opened and switch 2 is closed. What is the current through the right resistor immediately after switch 2 is closed? A B. IR = V/3R C. IR = V/2R D. IR = V/R A. B IR = 0 C D I
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V V C ! 4 2R 23 ; A circuit is wired up as shown below. The capacitor is initially uncharged and switches S1 and S2 are initially open. ' Now suppose both switches are closed. What is the voltage across the capacitor after a A very long time? B V =0 A. C B. VC = V C. VC = 2V/3 C 26 = A circuit is wired up as shown below. The capacitor is initially uncharged and switches S1 and S2 are initially open. ' Now suppose both switches are closed. What is the voltage across the capacitor after a A very long time? B V =0 A. C B. VC = V C. VC = 2V/3 C 0 % $ . ( ) . ' > $
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% ? 47 The two circuits shown below contain identical capacitors that hold the same charge at t = 0. Circuit 2 has twice as much resistance as circuit 1. ' E 0# 1# # % % F 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 = RequivC
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1 2 3 4 5 6 7 8 9 10 The two circuits shown below contain identical capacitors that hold the same charge at t = 0. Circuit 2 has twice as much resistance as circuit 1. ' . Which of the following statements best describes the charge remaining on each of the the two capacitors for any time after t = 0? B. Q1 > Q2 C. Q1 = Q2 A. Q1 < Q2 D. Q1 < Q2 at first, then Q1 > Q2 after long time E. Q1 > Q2 at first, then Q1 < Q2 after long time 50 , The two circuits shown below contain identical capacitors that hold the same charge at t = 0. Circuit 2 has twice as much resistance as circuit 1. ' . Which of the following statements best describes the charge remaining on each of the the two capacitors for any time after t = 0? B. Q1 > Q2 C. Q1 = Q2 A. Q1 < Q2 D. Q1 < Q2 at first, then Q1 > Q2 after long time E. Q1 > Q2 at first, then Q1 < Q2 after long time 50 5 The two circuits shown below contain identical capacitors that hold the same charge at t = 0. Circuit 2 has twice as much resistance as circuit 1. ' ' .. Which of the following statements best describes the charge remaining on each of the the two capacitors for any time after t = 0? B. Q1 > Q2 C. Q1 = Q2 A. Q1 < Q2 1 D. Q1 < Q2 at first, then Q1 > Q2 after long time E. Q1 > Q2 at first, then Q1 < Q2 after long time 0.9
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This document was uploaded on 03/08/2012.
 Fall '12

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